Adjustable brake-head.



IIIIIIIIIIIIIIIII AN. 111111 o.

961,921 v Patented June 21, 1910.

UNITED STATES PATENT QFIVIQE.

CHARLES I-I. WILLIAMS, JR., OF CHICAGO, ILLINOIS, ASSIGNOR TO CHICAGO RAILWAY EQUIIPMENT COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

ADJ'USTABLE BRAKE-HEAD.

Specficaton of Letters Patent.

ratented June 21,'1910.

Application filed January lO, 1910. Serial No. 537,138.

To aZZ whom it may soncem:

Be it known that I, CHARLES H. WIL- LLAMs, Jr., a citizen of the United States, residing at Chicago, Illinois, have invented a certain new and useful Improvement in Adjustable Brake-Heads, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l is a side elevational view partly in section of my mproved adjustable brake head. Fig. 2 is a face view of the locking block. Fig. 3 is a bottom fragmentary plan view of the brake head. Fig. 4 is a modified form. Fig, 5 is anotherl modified form. Fig. 6 is a face view of the locking block shown in Fig. 5. Fig. 7 is a bottom fragnientary plan view of the brake head shown in Fig. 5. Figs. S, 9 and 10 are various modifications.

This invention relates to a new and useful improvement in adjustable brake heads or brake beams, particularly the trussed type of brake beani, wherein there is a circular thrust block or sleeve at the end of the beam in which the compression member is seated, and to which the tension member is connected.

My present improvement contemplates a novel arrangement of the locking device for holding the brake head in adjustable positions to prevent the same tilting or falling by gravity.

In practice, the brake head is set approximately to the position it will occupy when applied to a wheel, the first application of the brakes causing the head to adjust itself or turn on the part of the brake beam on which it is mounted, so that it will properly adapt the shoe to the contour of the wheel. The means for holding the head in adjustable positions may be a serrated or corrugated locking block, shown in Figs. l to 7 inclusive, or a smooth faced friction element, shown in Figs. 8 to 10, inclusive, as desired.

In the drawings, l indicates the brake head having a eircular socket for fitting on the part 2 of the brake beam. This part 2 is shown as a solid element, and hence may be considered a Conventional illustration of the thrust block or sleeve at the end of the compression and tension members.

The part 2 on which the brake beam is mounted, is provided with a recess or opening for receiving a guide for the locking block, and a support for the spring, which yieldingly holds such locking block in position. In Fig. l this recess is T-shaped and the locking block guide and spring support 3 which fits therein, is in the form of a T- bolt, whose cross head fits in the T-shaped grooves Qfl, and whose shank, throughout a part of its length, is angular in cross section where it passes through a square hole 4a of the locking block 4, the end of said shank being threaded to receive a nut 5.

6 indicates a spring interposed between the nut 5 and the locking block 4, said spring tending to hold said locking block inwardly.

The wall of the socket in the brake head is provided with a circumferential slot la, which slot has laterals lb, as shown in Fig. 3. On each side of the slot are` serrations or corrugations le, for coperation with a correspondingly serrated or corrugated inner face of the locking block.

l 1 are circumferentially disposed ribs on the brake head for guiding the locking block in its movement incident to the adjustment of the head on the beam.

In assembling the parts the head of the T-bolt is positioned in the T-shaped groove of the thrust block and the head slipped into position. Any well known means, such as a cotter pin passing through a perforated lock on the end of the thrust block, may be used for preventing the displacement of the head on the part on which it is mounted. The nut may be tightened up to place any desired compression on the spring, and hence the amount of said compression is variable.

In Fig. 4, instead of using a T-bolt, I have provided the thrust block with a tapped opening into which a machine bolt Ga may be screwed to support the spring and yieldingly hold the locking block in position.

In Fig. 5, I have shown a square headed bolt 7, the square head of said bolt being received in an opening of the thrust block similar to the T-shaped bolt.

In Fig. 8 I have shown a machine bolt 8 and a semielliptical sleeve spring 9 strung thereon, whose ends bear against the outer face of the brake head. This construction does away with serrated teeth and a special locking block, the brake head being held in position by friction.

and the other of which, at its center, co-` operates with the outer face of the brakehead.

respects being similar to that shown in Fig. 4.

It will 'be noticed with regard to all these forms, that the spring exerts its energy inwardly against the outer face of the brake head, and as the support for the spring is, in every instance, secured to the thrust block, or part of the brake beam on which the head is mounted, the above action of the spring tends to draw that part of the brake beam against the inner wall' of the socket of the brake head, and in this manner rattling between theV parts is prevented.

In the old style Robischung adjustable head, see Patent No. 485,823, dated November 8, 1892, the looking block wasv pressed inwardly against the thrust block by a spring whose energies were exerted outwardly against the head, thus tending to separate the head and thrust block at the point where the spring was located. This permitted of motion between the parts and considerable wear resulted.

I claim:

1. The combination of a brake head, a part on which said head is mounted and means for yieldingly and adjustably holding the head on said part, said means being supported by said part and engaging the outer face of the head.

2. The combination of an adjustable brake head, a part on which the same is mounted and an element extending from said part to the brake head and provided with means for yieldingly and adjustably holding said head in'position.

3. The combination of an adjustable brake head, of a part on which the same is mounted, a. holding block engaging the outer face of the adjustable head, a guiding means for said block carried by the part on which the head is mountedl and yielding means bearing against said block.

4. The combination of an adjustable brake head, of a part on which it is mounted, a

holding block engaging the outer face of the brake head, guiding means for said block 1 In Fig. 10 I have shown a smooth faced looking block 11, the construction in other' mounted on said part and extending through said head and said block and yielding means -arranged exteriorly of said head for exerta block engaging the outer face of the head and means carried by said part for yieldingly forcing the block inwardly against the head.

6. The combination of an adjustable brake head, a part on which the same is mounted, holding means coperating with the outer face of said? head and a spring carried by said part forcing said holding means inwardly against said head.

7. The combination of an adjustable'brake head, a part on which the same is mounted, means coperating with the outer face of said head, a bolt separably connected to said part and a spring carried by said bolt and coperating with said holding means.

8. The combination of an adjustable brake head, of a part on which the same is mounted,` holding means coperating with the outer face of the brake head, a bolt separably connected to said part and acting as a guide for said holding` means and a spring supported by said bolt and coperating with said holding means.

9. The combination of a brake head, a part on which saidV head is mounted and a spring exerting its energy inwardly against the outer face of the brake head and outwardly against the part of the beam on which the head is mounted for adjustably holding said -head in position.

10. vThe combination of an adjustable brake head, a part on which4 the same is mounted, and means exerting a yieldinflv outward pressure on said part and an inwar pressure on the outer face of the brake head.

11. The combination of anadjustable brake head, a part on which the same is mounted, means exerting a yielding outward pressure on said part and an inward pressure on the outer face of the brake head and a friction block interposed between said means and theouter face of the brake head.

In testimony whereof I hereunto aiflx my signature in the presence of two witnesses, this 27th day of December, 1909.

CHARLES H. WILLIAMS, JR.

WVitnesses:

EDWARD T. l/VALKER, J. W. WEINLANDs. 

